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1. 发明授权

US6005999A Waveguide narrowband rejection filter 失效
标题翻译：波导窄带滤波器
公开(公告)号：US6005999A
公开(公告)日：1999-12-21
申请号：US975843
申请日：1997-11-21
申请人： Harmeet Singh , Charles W. Haggans , Wayne F. Varner
发明人： Harmeet Singh , Charles W. Haggans , Wayne F. Varner
IPC分类号： G02B6/02 , G02B6/036 , G02B6/34 , G02B6/22
CPC分类号： G02B6/03644 , G02B6/02119 , G02B6/03633
摘要： An optical fiber filter including a length of single mode fiber having an operating wavelength .lambda..sub.0. Fiber designs may include a depressed inner clad fiber, a photosensitive matched inner clad fiber or a photosensitive depressed inner clad fiber. The length of fiber includes a core, an inner cladding, an outer cladding and an azimuthally asymmetric grating. The core allows the existence of a LP.sub.01 core mode having an effective index of n.sub.eff,01 and the cladding allows the existence of a LP.sub.1m cladding mode, m.gtoreq.1. The core has an index of refraction n.sub.co and a radius A. The inner cladding has an index of refraction n.sub.ic, an inner radius A, an outer radius AB, a thickness W, where W=AB-A, and a refraction difference .DELTA.n-, where .DELTA.n- is the difference between n.sub.ic and n.sub.oc and n.sub.co >n.sub.oc >n.sub.ic. The inner cladding may be photosensitive to a radius R.sub.grat and have a fractional photosensitivity .gamma.. The outer cladding generally laterally surrounds the inner cladding and has an inner radius AB, an outer radius B, and an index of refraction n.sub.oc, where .DELTA.n.sub.+ is the difference between n.sub.co and n.sub.oc. The grating has an effective tilt angle .theta. and a period (.LAMBDA.), where .LAMBDA..ltoreq.(.lambda..sub.0 cos .theta.)/(2n.sub.eff,01), the maximum relative coupling coefficient for the cladding mode max(RCC.sub.1m) being greater or equal to 0.2 and the ratio of peak reflectivities for the cladding mode and the core mode RR being greater or equal to 1.
摘要翻译：包括具有工作波长λ0的单模光纤的长度的光纤滤波器。光纤设计可以包括凹陷内包层光纤，光敏匹配的内包层光纤或光敏凹陷的内包层光纤。纤维的长度包括芯，内包层，外包层和方位不对称光栅。核心允许存在具有有效指数为neff，01的LP01核心模式，并且包层允许存在LP1m包层模式，m> / = 1。芯具有折射率nco和半径A.内包层具有折射率nic，内半径A，外半径AB，厚度W，其中W = AB-A，折射差DELTA n - 其中，DELTA n-是nic和noc之间的差异，nco> noc> nic。内包层可以对半径Rgrat感光，并具有分数光敏度γ。外包层通常侧向包围内包层，并且具有内半径AB，外半径B和折射率noc，其中，ΔTAn +是nco和noc之间的差。光栅具有有效倾斜角θ和周期（LAMBDA），其中LAMBDA

2. 发明授权

US5852690A Depressed cladding fiber design for reducing coupling to cladding modes in fiber gratings 失效
标题翻译：抑制包层光纤设计，用于减少耦合到光纤光栅中的包层模式
公开(公告)号：US5852690A
公开(公告)日：1998-12-22
申请号：US884889
申请日：1997-06-30
申请人： Charles W. Haggans , Wayne F. Varner
发明人： Charles W. Haggans , Wayne F. Varner
IPC分类号： G02B6/02 , G02B6/036 , G02B6/34
CPC分类号： G02B6/03644 , G02B6/02009 , G02B6/02023 , G02B6/021 , G02B6/02061 , G02B6/02104
摘要： A waveguide, such as an optical fiber waveguide for guiding light waves, which can provide a strongly reflective grating (e.g., a Bragg grating) at a specified wavelength while maintaining very low losses at adjacent wavelengths. The waveguide includes a core, an inner cladding laterally surrounding the core, an outer cladding laterally surrounding the inner cladding, and a grating pattern. The core has a refractive index n.sub.co and a first transverse dimension 2A. The inner cladding has a width W and a refractive index n.sub.ic. The outer cladding has a refractive index n.sub.oc. The relation between the refractive indexes, n.sub.co >n.sub.oc >n.sub.ic and 0.5
摘要翻译：波导，例如用于引导光波的光纤波导，其可以在特定波长处提供强反射光栅（例如，布拉格光栅），同时在相邻波长处保持非常低的损耗。波导包括芯，横向围绕芯的内包层，横向围绕内包层的外包层和光栅图案。芯具有折射率nco和第一横向尺寸2A。内包层具有宽度W和折射率nic。外包层具有折射率noc。折射率nco> noc> nic和0.5

3. 发明授权

US06967768B1 Optical communication system having dynamic gain equalization 有权
公开(公告)号：US06967768B1
公开(公告)日：2005-11-22
申请号：US10144082
申请日：2002-05-13
申请人： Charles W. Haggans , Jun Bao , Harshad Sardesai , Michael Y. Frankel , Mahir Nayfeh , Balakrishnan Sridhar
发明人： Charles W. Haggans , Jun Bao , Harshad Sardesai , Michael Y. Frankel , Mahir Nayfeh , Balakrishnan Sridhar
摘要： An optical communication device, and related method, are provided for reducing ripple in WDM systems. In particular, the optical communication device includes a dynamic gain equalization (DGE) circuit is coupled to an optical communication path carrying the WDM optical signals. The DGE circuit adjusts the powers associated with each channel on a channel-by-channel basis so that the WDM optical signal has a desired power spectrum. The DGE is controlled in response to sense signals generated by an optical performance monitoring (OPM) circuit located downstream from the DGE or substantially co-located with the DGE. The OPM monitors the WDM spectrum for optical signal power variations and outputs the sense signal when the variations fall outside a given tolerance. Typically, one DGE is associated with a group of concatenated amplifiers so that multiple DGEs are provided in a system having many groups of such amplifiers. Likewise, multiple OPMs are provided in such systems, each corresponding to a respective DGE, so that ripple can be reduced and desired WDM optical signal powers can be achieved in the WDM system.

4. 发明授权

US07075711B2 Optical communication system having dynamic gain equalization 有权
标题翻译：具有动态增益均衡的光通信系统
公开(公告)号：US07075711B2
公开(公告)日：2006-07-11
申请号：US10986817
申请日：2004-11-15
申请人： Charles W. Haggans , Jun Bao , Harshad Sardesai , Michael Y. Frankel , Mahir Nayfeh , Balakrishnan Sridhar , Vipul Bhatnagar
发明人： Charles W. Haggans , Jun Bao , Harshad Sardesai , Michael Y. Frankel , Mahir Nayfeh , Balakrishnan Sridhar , Vipul Bhatnagar
IPC分类号： H04B10/12 , H04J14/00
CPC分类号： H04B10/296
摘要： An optical communication device, and related method, are provided for reducing ripple in WDM systems. In particular, the optical communication device includes a dynamic gain equalization (DGE) circuit is coupled to an optical communication path carrying the WDM optical signals. The DGE circuit adjusts the powers associated with each channel on a channel-by-channel basis so that the WDM optical signal has a desired power spectrum. The DGE is controlled in response to sense signals generated by an optical performance monitoring (OPM) circuit located downstream from the DGE or substantially co-located with the DGE. The OPM monitors the WDM spectrum for optical signal power variations and outputs the sense signal when the variations fall outside a given tolerance. Typically, one DGE is associated with a group of concatenated amplifiers so that multiple DGEs are provided in a system having many groups of such amplifiers. Likewise, multiple OPMs are provided in such systems, each corresponding to a respective DGE, so that ripple can be reduced and desired WDM optical signal powers can be achieved in the WDM system.
摘要翻译：提供了一种光通信设备及相关方法，用于减少WDM系统中的纹波。特别地，光通信设备包括动态增益均衡（DGE）电路耦合到承载WDM光信号的光通信路径。 DGE电路在逐个通道的基础上调整与每个通道相关联的功率，使得WDM光信号具有所需的功率谱。响应由位于DGE下游的光学性能监视（OPM）电路产生的感测信号或与DGE基本上同一位置来控制DGE。 OPM监视WDM频谱的光信号功率变化，并在变化值超出给定公差时输出感测信号。通常，一个DGE与一组级联放大器相关联，使得在具有许多这种放大器组的系统中提供多个DGE。类似地，在这样的系统中提供多个OPM，每个对应于相应的DGE，使得纹波可以减少，并且可以在WDM系统中实现期望的WDM光信号功率。

5. 发明授权

US6058231A Boron-doped optical fiber 失效
标题翻译：硼掺杂光纤
公开(公告)号：US6058231A
公开(公告)日：2000-05-02
申请号：US23626
申请日：1998-02-13
申请人： Charles W. Haggans , Wayne F. Varner , Jau-Sheng Wang
发明人： Charles W. Haggans , Wayne F. Varner , Jau-Sheng Wang
IPC分类号： G02B5/18 , G02B6/34
CPC分类号： G02B6/02114
摘要： A single-mode optical fiber that includes: (a) a core that includes silica and is characterized by a first refractivity that changes upon exposure to actinic radiation of a predetermined wavelength; and (b) a cladding surrounding the core that also includes silica and is characterized by a second refractivity different from the first refractivity that changes upon exposure to actinic radiation of a predetermined wavelength. At least one of the core and the cladding further includes boron, the relative amounts of boron in the core and cladding being selected such that the first refractivity and the second refractivity change by substantially the same amount upon exposure to actinic radiation of a predetermined wavelength.
摘要翻译：一种单模光纤，其包括：（a）包含二氧化硅的芯，其特征在于当暴露于预定波长的光化辐射时变化的第一折射率; 和（b）围绕芯的包层，其还包括二氧化硅，其特征在于与暴露于预定波长的光化辐射的第一折射率不同的第二折射率。芯和包层中的至少一个还包括硼，选择芯和包层中的硼的相对量，使得当暴露于预定波长的光化辐射时，第一折射率和第二折射率基本相等。

6. 发明授权

US07092148B1 Optical communication system having dynamic gain equalization 有权
公开(公告)号：US07092148B1
公开(公告)日：2006-08-15
申请号：US10144082
申请日：2002-05-13
申请人： Charles W. Haggans , Jun Bao , Harshad Sardesai , Michael Y. Frankel , Mahir Nayfeh , Balakrishnan Sridhar , Vipul Bhatnagar
发明人： Charles W. Haggans , Jun Bao , Harshad Sardesai , Michael Y. Frankel , Mahir Nayfeh , Balakrishnan Sridhar , Vipul Bhatnagar
IPC分类号： H01S3/00
CPC分类号： H04B10/296
摘要： An optical communication device, and related method, are provided for reducing ripple in WDM systems. In particular, the optical communication device includes a dynamic gain equalization (DGE) circuit is coupled to an optical communication path carrying the WDM optical signals. The DGE circuit adjusts the powers associated with each channel on a channel-by-channel basis so that the WDM optical signal has a desired power spectrum. The DGE is controlled in response to sense signals generated by an optical performance monitoring (OPM) circuit located downstream from the DGE or substantially co-located with the DGE. The OPM monitors the WDM spectrum for optical signal power variations and outputs the sense signal when the variations fall outside a given tolerance. Typically, one DGE is associated with a group of concatenated amplifiers so that multiple DGEs are provided in a system having many groups of such amplifiers. Likewise, multiple OPMs are provided in such systems, each corresponding to a respective DGE, so that ripple can be reduced and desired WDM optical signal powers can be achieved in the WDM system.

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